/* osval.c
 *
 * COPYRIGHT (c) 1995 by AT&T Bell Laboratories.
 */

#include "ml-unixdep.h"
#include <sys/types.h>
#include <sys/wait.h>
#include "ml-base.h"
#include "ml-values.h"
#include "tags.h"
#include "ml-objects.h"
#include "ml-c.h"
#include "cfun-proto-list.h"
#include "../posix-error/posix-name-val.h"

static name_val_t values [] = {
  {"WNOHANG",       WNOHANG},
#ifdef WUNTRACED
  {"WUNTRACED",     WUNTRACED},
#endif
};

#define NUMELMS ((sizeof values)/(sizeof (name_val_t)))

/* _ml_P_Process_osval : string -> int
 *
 * Return the OS-dependent, compile-time constant specified by the string.
 */
ml_val_t _ml_P_Process_osval (ml_state_t *msp, ml_val_t arg)
{
    name_val_t      *res;
    
    res = _ml_posix_nv_lookup (STR_MLtoC(arg), values, NUMELMS);
    if (res)
	return INT_CtoML(res->val);
    else {
	return RAISE_ERROR(msp, "system constant not defined");
    }

} /* end of _ml_P_Process_osval */